Lock for piston-rings.



PATEN'TED JUNE 9,- 1908.

M. 'H. SULLIVAN. LOCK FOR PISTON RINGS.-

APPLICATION FILED AUG. 12, 1907.

WW1 maqco nIciIAnL'H. sUL ivAN, or rooennnnrsre, New YORK.

Leer: FOE Heron-nines.

Application filed August 12, 1907'. Serial is. 388,224.

.use'l'ul Improvements in Locks for Pistonlot Rin s, of which the 'i'ollowing is a specification. 'l ii's' invention relates to piston packing rings and more particularly to means for locking the same so as tojprcvent the escape or passage. ol' steam aroiind the joint orends of the rings where they are united, I

' The object of the in'yention to provide a structure which will be simple. cheapandei- Iicient and can be readil applied to pistons 01 internal QXplUSlOD or gas engines. I

It also has for its object to provide means for supporting what are known as carrying rings. l

With these and other objects in view, the

invention consists in the improved construcpiston and t'ion and novel arrangement of a the packing rings therefor.

In the accoinpa-iiying drawings, whicn illustrate the invention, Figure 1 is a broken end View of a'piston for gas engines; Fig. 2 s av broken plan View of the same, showing the rings in position thereon; Fig. '3 is a hrolten perspective View of part of the end of a pist o n,- withithe ends oi a pressure ring and the k-therefor shown detached or separated Fig. 415 a transverse sect onal View of a piston, showing a (.arrying ring; and also a pres sure ring surrounding the carrying ring; and Fig. 5 is a detail sectional View of the rings, showing the means: for connecting them together and holding them in position.

Referring more, particularly to the drawings, which are for illustrative purposes only. and, therefore, are not drawn to an particu lar scale, 1 indicates the piston for the engine,

which ma)" heof an} size and'construction.

The'peri'phery of the piston is provided V recesses, 18 in the hodypof the piston. Springs, IQ-fare preferably seated in the rewith the usual annular recesses, 2 and 3, within which are seated rings, 4 and 5. The

recesses, 3, are preferably formed in i the usual manner with their walls continuous or unbroken, and the rings-,5 are preferably of the lock, 7, .which is preferably secured at Specification oi Letters Patent.

therebw prevented from passing to the ends] Patented-June 9, 1

one end. to the ring, 4,-as-b .1means of; through the perlorations,,8.- I f As heretofore constructed, the ends of tli e lock fitted snugly in the, ends of the reeess, f8, but it has been found thatwhen subjected, to the terrific pressure which occurs at the 1 time of explosion in an internal combustion or gas engine, that a portion ot the gases is" apt to he forced down in between the spactgf' t), between the ends o'f'the ring, and to es cape at the ends of the recess, i To prevent this passage and escape oi the gas, I provide two shoulders, or abutments, 10. adjacent :to; the ends of the recess,'(

5, and also to form a suh-recess, 11, with Which two shoulders, 12, at the ends. of the loclgi, are adapted'to en gage,'tlie lock beiiigproridcd with a recess, 13, adjacent to each end for the 'icce t'imi hi. the" shoulders, 10. Pat constructing the 7 parts in this'niann'er, when the lock, '7, is rig-- idly secured to the side of the ring' ii, with a; projection, 14, thereon, litting'in a notch or "recess, 15, in the ring, the'lock is s'eatedin the-recess, 6, with the free end-oi the ring; 4&0 resting fiatwise against the free endfln the lock, as will he understood. With the parts assembled in this manner, it is erident that anrgasfthat may enter the space, @{will meet the shoulders, '10 and 12:,and will. K

of the lock, 7, and escaping from t'lie'i' ece 6, as is apt to occur without said shoulders. the same tinie,' the ring, can-act exp sivelj so as to engage with the interior otl the cylinder in'the same manner as though If desired, carrying rings,i1 6; may be ssea i ed in the bottom of the channels or groove 2 and. 3, for supporting the outer orpressure rings, as shown in Fig. W'itli/this. construction, t'herings 16 are fo'r -ned in seg n1ents,with one ormore projections, '17, upolr the inner face thereof 5 fittingin suitable cesses, 18, forengaging' with theproje'etion, 17,, or the rings, 16, fiifld'DOIIhally; forcing the same outward against the-interior .ofa-thr;

ressure rin s so as to assist in expanding or orcing the latteroutwardso as to engage. with the interior of the cylinder with as much pressure as desired, By eonstri'icting the i6 with their projections, 17, the

rm s-are prevented'from mov ng longitude ney Within the annular recesses, and the pressure rmes are referably connected with the carryin movement within the recesses as-bv means of one or more pins, 20,-Which extend through a perforation in the pressure ring into arecess formed in the carrying rings, 16, and the pro ections, 1T, thereon The proections, 1 l also assist 1n preventing the passage of any gases circumferentially around .in the lock t'o. any style of locking ri-n o y requisite being that the reccss,.1nthe the grooves, 2 and 3, from the space between the ends of the inner rings to the space be" tween the ends of the outer rings, thereby adding to the efficiency of the locking rings.

rectangular, as shown in the draW1ng,W1th-,

out departing from the spirit of the inven-' tion or destroying the efficiency of the structure. The use of the inner or carrying rings also assists. ,1 naterially in the efficiency of the construction, and can be easily applied by cutting the grooves or channels in the pistonto. a sufficient depth and providing the bottom of each with the desired recesses.

' Having thus fully described my invention,

' what I claim as new, and desire to secure by Letters-Patent, is:

1. The combination with a circumferentially grooved piston having a recess formed str in one Wall of said groove, of apressure ring in said groove, and a lockfor said ring adapted to fit in said recess, the bottom of the lock andlfof the recess being constructed with obtions to prevent the passage of the gases.

. The combination with a circumferentia rooved piston having a recess formed in? e. 'wall of the, groove, and shoulders formed inlthe bottom of therecess, a pressure ring in said groove, a locksecured' thereto. at one end,.a n d adapted; to'ifit ihsaidrecess,

the inner edge of the lock being provided with shoulderstand recesses to correspond with the bottom .ofthe recess in the piston.

, 3. The combination with a circumferentially grooved'piston hav'ngja'recess formed 7 'in'o'ne wall of said groove," the ends of said re- 'cess being provided fwitha shoulder and a sub-recess, a' pressure-.ringgin said: groove, a

l rings so as to be held against longitudinal recess in the cylindeflthe .endfs; of said-plate" an'inner and an outer ring in said groove, the

.tions outwardly, the outer ring to correspond locking plate rigidlysecured at one end to one end of said rin and adapted to fit in the being each provided with a shoulde'rf'anda recess. 1 4. The combination with a circumfereifi tially grooved piston having a recess formed in one .wall of said gro'ove, having the ends each provided 'With a rectangular-shoulder and a sub-recess, an L-shaped pressure ring for said groove having a notch in its inner edge of one end, anda locking plate rigidly secured to the notched end of said ring and provided with a projection for fitting in said notch, the ends of such plate being each provided with a projection and arecess forengaging with the shoulder and recessed ends of'the recess in the piston.

5; The combination, with a piston provided with a circumferential groove, with recesses in its bottom and having a shouldered recess inone wall, an inner and an outer ring in said groove, the inner ring being provided with projections for fitting in'the recess in the bot-tom of said groove, springs in said recesses for forcing the inner ring outward, and a shouldered lock secured to one end of the outer ring and adapted to fit in said shouldered recess. v

6. The. combination with a piston provided with a circumferential groove and having re cesscs in-the bottom of, the groove and a shouldered recess in one wall of the groove,

inner ring being formed in sections and each section provided with a projection for fitting, in the recess of the bottom of the groove, said section and projection being recessed, a spring in each recess adapted to force the secbeing perforated to register with the recess of the inner ring, pins through .said perforations into said recesses, and a locking plate rigidly: secured at one end to one end of the pressure ring and adapted to fit in the recesses in the Wall of the. 100

groove, each end of said platetbeing recessed with the shoulders in said 'recesscs.

vIn testimony whereof I have signed my name to this specification in the presence of 1 two subscribing Witnesses.

Y MICHAELJH;

Witnesses: i BENJQG. CowL,

L. O..HILTON..

SULLIVAN. 

